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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aea3725ed4c9b668f4c35be87b3f5373eac27b55fd72a98d2d0a83d5d6db9f8e' 
  AND token = 'cI7S2mshGVbtlHGIRwS8phf/pHRSJRXllLy9zK1qur0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}